The theory, published in the journal Physical Review Letters, suggests that glass does not undergo a phase transition, as previously thought, but rather a continuous transformation.
"We believe that glass is a unique state of matter that does not fit into the traditional categories of solid, liquid, or gas," said study lead author Pablo Debenedetti, a professor of chemical engineering at Princeton University. "Our theory provides a new way of understanding how glass forms and behaves."
The traditional view of glass is that it is a liquid that has been cooled so quickly that it does not have time to crystallize. This theory, known as the "kinetic theory of glass formation," has been widely accepted for over a century.
However, the kinetic theory has some problems. For example, it cannot explain why some liquids, such as water, easily form crystals, while others, such as glass, do not. It also cannot explain why the properties of glass depend on the rate at which it is cooled.
The new theory, known as the "thermodynamic theory of glass formation," suggests that glass does not undergo a phase transition because it is not a thermodynamically stable state. Rather, glass is a metastable state that is trapped between the liquid and crystalline states.
"Our theory suggests that glass is not a frozen liquid, but rather a unique state of matter that is characterized by its inability to crystallize," Debenedetti said. "This new understanding of glass could lead to new ways to design and control the properties of glass and other amorphous materials."
The thermodynamic theory of glass formation is still in its early stages, but it has already generated a lot of excitement in the scientific community. Scientists are hopeful that the theory will eventually lead to a complete understanding of how glass forms and behaves.
